1 /* $NetBSD: rip6query.c,v 1.7 2001/11/16 07:09:37 itojun Exp $ */ 2 /* $KAME: rip6query.c,v 1.15 2001/11/16 07:01:21 itojun Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <stdio.h> 34 35 #include <unistd.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <ctype.h> 39 #include <signal.h> 40 #include <errno.h> 41 #include <err.h> 42 43 #include <sys/types.h> 44 #include <sys/socket.h> 45 #include <sys/queue.h> 46 47 #include <net/if.h> 48 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 49 #include <net/if_var.h> 50 #endif /* __FreeBSD__ >= 3 */ 51 #include <netinet/in.h> 52 #include <netinet/in_var.h> 53 #include <arpa/inet.h> 54 #include <netdb.h> 55 56 #include "route6d.h" 57 58 #define DEFAULT_WAIT 5 59 60 int s; 61 int query_wait = DEFAULT_WAIT; 62 struct sockaddr_in6 sin6; 63 struct rip6 *ripbuf; 64 65 #define RIPSIZE(n) (sizeof(struct rip6) + (n-1) * sizeof(struct netinfo6)) 66 67 int main __P((int, char **)); 68 static void usage __P((void)); 69 static void sigalrm_handler __P((int)); 70 static const char *sa_n2a __P((struct sockaddr *)); 71 static const char *inet6_n2a __P((struct in6_addr *)); 72 73 int 74 main(argc, argv) 75 int argc; 76 char **argv; 77 { 78 struct netinfo6 *np; 79 struct sockaddr_in6 fsock; 80 int i, n, len, flen; 81 int c; 82 int ifidx = -1; 83 int error; 84 char pbuf[10]; 85 struct addrinfo hints, *res; 86 87 while ((c = getopt(argc, argv, "I:w:")) != -1) { 88 switch (c) { 89 case 'I': 90 ifidx = if_nametoindex(optarg); 91 if (ifidx == 0) { 92 errx(1, "invalid interface %s", optarg); 93 /*NOTREACHED*/ 94 } 95 break; 96 case 'w': 97 query_wait = atoi(optarg); 98 break; 99 default: 100 usage(); 101 exit(1); 102 /*NOTREACHED*/ 103 } 104 } 105 argv += optind; 106 argc -= optind; 107 108 if (argc != 1) { 109 usage(); 110 exit(1); 111 } 112 113 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 114 err(1, "socket"); 115 /*NOTREACHED*/ 116 } 117 118 /* getaddrinfo is preferred for addr%scope syntax */ 119 snprintf(pbuf, sizeof(pbuf), "%d", RIP6_PORT); 120 memset(&hints, 0, sizeof(hints)); 121 hints.ai_family = AF_INET6; 122 hints.ai_socktype = SOCK_DGRAM; 123 error = getaddrinfo(argv[0], pbuf, &hints, &res); 124 if (error) { 125 errx(1, "%s: %s", argv[0], gai_strerror(error)); 126 /*NOTREACHED*/ 127 } 128 if (res->ai_next) { 129 errx(1, "%s: %s", argv[0], "resolved to multiple addrs"); 130 /*NOTREACHED*/ 131 } 132 if (sizeof(sin6) != res->ai_addrlen) { 133 errx(1, "%s: %s", argv[0], "invalid addrlen"); 134 /*NOTREACHED*/ 135 } 136 memcpy(&sin6, res->ai_addr, res->ai_addrlen); 137 if (ifidx >= 0) 138 sin6.sin6_scope_id = ifidx; 139 140 if ((ripbuf = (struct rip6 *)malloc(BUFSIZ)) == NULL) { 141 err(1, "malloc"); 142 /*NOTREACHED*/ 143 } 144 ripbuf->rip6_cmd = RIP6_REQUEST; 145 ripbuf->rip6_vers = RIP6_VERSION; 146 ripbuf->rip6_res1[0] = 0; 147 ripbuf->rip6_res1[1] = 0; 148 np = ripbuf->rip6_nets; 149 bzero(&np->rip6_dest, sizeof(struct in6_addr)); 150 np->rip6_tag = 0; 151 np->rip6_plen = 0; 152 np->rip6_metric = HOPCNT_INFINITY6; 153 if (sendto(s, ripbuf, RIPSIZE(1), 0, (struct sockaddr *)&sin6, 154 sizeof(struct sockaddr_in6)) < 0) { 155 err(1, "send"); 156 /*NOTREACHED*/ 157 } 158 signal(SIGALRM, sigalrm_handler); 159 for (;;) { 160 flen = sizeof(fsock); 161 alarm(query_wait); 162 if ((len = recvfrom(s, ripbuf, BUFSIZ, 0, 163 (struct sockaddr *)&fsock, &flen)) < 0) { 164 err(1, "recvfrom"); 165 /*NOTREACHED*/ 166 } 167 alarm(0); 168 printf("Response from %s len %d\n", 169 sa_n2a((struct sockaddr *)&fsock), len); 170 n = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) / 171 sizeof(struct netinfo6); 172 np = ripbuf->rip6_nets; 173 for (i = 0; i < n; i++, np++) { 174 printf("\t%s/%d [%d]", inet6_n2a(&np->rip6_dest), 175 np->rip6_plen, np->rip6_metric); 176 if (np->rip6_tag) 177 printf(" tag=0x%x", ntohs(np->rip6_tag)); 178 printf("\n"); 179 } 180 } 181 182 exit(0); 183 } 184 185 static void 186 usage() 187 { 188 fprintf(stderr, "Usage: rip6query [-I iface] [-w wait] address\n"); 189 } 190 191 /* getnameinfo() is preferred as we may be able to show ifindex as ifname */ 192 static const char * 193 sa_n2a(sa) 194 struct sockaddr *sa; 195 { 196 static char buf[NI_MAXHOST]; 197 198 if (getnameinfo(sa, sa->sa_len, buf, sizeof(buf), 199 NULL, 0, NI_NUMERICHOST) != 0) { 200 snprintf(buf, sizeof(buf), "%s", "(invalid)"); 201 } 202 return buf; 203 } 204 205 static const char * 206 inet6_n2a(addr) 207 struct in6_addr *addr; 208 { 209 static char buf[NI_MAXHOST]; 210 211 return inet_ntop(AF_INET6, addr, buf, sizeof(buf)); 212 } 213 214 static void 215 sigalrm_handler(sig) 216 int sig; 217 { 218 219 exit(0); 220 } 221